US PATENT SUBCLASS 104 / 247
.~.~ Horizontal thrust only

Current as of: June, 1999
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104 /   HD   RAILWAYS

242  DF  DERAILMENT GUARDS {5}
245  DF  .~ Guide rollers {2}
247.~.~ Horizontal thrust only

DEFINITION

Classification: 104/247

(under subclass 245) Derailment guards, in which the guide-rollers have horizontal thrust only, without any restraining means against vertical displacement.